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-rw-r--r--gnu/usr.bin/tar/tar.113
1 files changed, 11 insertions, 2 deletions
diff --git a/gnu/usr.bin/tar/tar.1 b/gnu/usr.bin/tar/tar.1
index ce6a8df..60fd20a 100644
--- a/gnu/usr.bin/tar/tar.1
+++ b/gnu/usr.bin/tar/tar.1
@@ -267,6 +267,10 @@ to expect null-terminated names; disables
.It Fl -totals
Prints total bytes written with
.Fl -create.
+.It Fl U
+.It Fl -unlink
+.It Fl -unlink-first
+Unlink files before creating them.
.It Fl v
.It Fl -verbose
Lists files written to archive with
@@ -319,9 +323,14 @@ Block the output of compression program for tapes or floppies
(otherwise writes will be of odd length, which device drivers may reject).
.It Fl [0-7][lmh]
Specify tape drive and density.
-.It Fl -unlink
-Unlink files before creating them.
.El
+.Sh ENVIRONMENT
+The environment variable
+.Ev TAR_OPTIONS
+can hold a set of default options for
+.Nm .
+These options are interpreted first and can be overwritten by explicit command
+line parameters.
.Sh EXAMPLES
To create an archive on tape drive /dev/rsa0 with a block size of 20
blocks, containing files named "bert" and "ernie", you can enter
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